NCERT

SOLUTIONSCHAPTER 1

CLASS 5

EVS

CHAPTER -1

SUPER SENSES

Page number: 2

Tell

Question 1. How did the ant know that the other ants were not from its group?

Answer:

Just like us, animals also have different senses. They can see, hear, smell and feel. Due to these

abilities, the ant came to know that the other ants were not from its group.

Question 2. How did the guard ant recognize this ant?

Answer:

Some animals can find their friends by their smell. The guard ant recognized this ant by its smell.

Try this and write

Drop some sugar, jaggery or anything sweet on the ground. Wait until the ants come there.

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Question 3. How long did it take the ants to come?

Answer:

It took 15-20 minutes for ants to come.

Question 4. Did one ant come first or a group of ants come together.

Answer:

One ant came first then the group comes afterward.

Question 5. What did the ants do with the food?

Answer:

Ants carried the food to their hole.

Question 6. Where do they go from there?

Answer:

They go to their hole from there.

Question 7. Do they move in a line?

Answer:

Yes, they move in a line.

Page number: 3

Now carefully, without harming the ants block their path for a while with a pencil.

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Question 8. Now observe, how do the ants move?

Answer:

Ants climb up on the pencil but move in a line only.

Question 9. Now you can guess why the ants behaved like that when you blocked their

path?

Answer:

As the ants move they leave a smell on the ground. The other ants follow the smell to find the

way. So, when their path was blocked, ants tried to maintain their original path by following the

scent.

Question 10. Have you ever been troubled by mosquitoes? Just think, how do they know

where you are?

Answer:

Mosquitoes find us by the smell of our body, soles of feet and also by the heat of our body.

Question 11. Have you seen a dog sniffing here and there? What do you think it is trying to

smell?

Answer:

Yes, I have seen dogs sniffing here and there. A dog can make out if another dog had come into

their area by the smell of its urine. So, in order to check out whether any other dog has come out

or not, a dog sniffs here and there.

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Page number: 4

Write

Question 12. In what ways do human beings use this special sense of smell of dogs?

Answer:

We use this special sense of smell of dogs to catch criminals, recover the stolen goods, search

out bombs and explosives, etc.

Question 13. When do you find your sense of smell helpful to you? List some examples.

Like-to know by its smell that food has gone bad or that something is burning.

Answer:

Besides smelling the bad food and the smell of burning our sense of smell helps us to choose

good food, perfume, soap, incense stick etc. and also to find out if any cloth is stinking due to

sweat.

Question 14. Name the animals that you would be able to recognize only by their smell,

without seeing them?

Answer:

We can recognize pet animals like dog, cat, cow, buffalo, goat etc. by their smell.

Question 15. Write the names of five things whose smell you like and five things whose

smell you do not like.

Answer:

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I like the smell of I don’t like the smell of

1. Food 1. Filth

2. Perfume 2. Death and decaying things

3. Flower 3. Drains

4. Cosmetic items 4. Gutter

5. Incense stick 5. Bad smelling chemicals

Question 16. Do you and your friends have similar answers?

Answer:

Yes, our answers are more or less the same.

Page number: 5

Do and Find Out

Question 17. From the smell of the clothes of your family members, can you say whom do

they belong to? Try to recognize the clothes of any two members of your family in this way.

Answer:

Yes, I can recognize the clothes of some members of my family by smelling their clothes.

I recognize the clothes of

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1. My Mother

2. My Father

Think and Discuss

Question 18. Sushila covered her nose when she cleaned Deepak’s nappy, but now when

she cleaned her daughter. Why do you think she did this?

Answer:

We often find a smell “bad” when we think it is from something dirty. If we make up our mind,

we may not be so offended by certain smells. So, Sushila covered her nose when she cleaned

Deepak’s nappy, but not when she cleaned her daughter.

Question 19. How do you feel when you walk near a heap of garbage? Think of the children

who spend the whole day picking garbage things from such garbage?

Answer:

I feel bad when I walk near a heap of garbage. The children who spend the whole day picking

things from such garbage may not find it so bad because once we make up our minds; we may

not be so offended by such smells.

Question 20. Is a smell ‘good’ or ‘bad’ for everyone in the same way? Or does it depend on

how each one feels about it?

Answer:

A smell is good or bad depends on how each one thinks about it.

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Page number: 6

Let’s See

Question 21. Write the name of a bird which has eyes in form of its head. ( like in humans ).

Answer:

An owl is one such bird.

Question 22. Write the names of some birds which have eyes on either side of the head.

What is the size of their eyes as compared to the size of their head?

Answer:

Birds like a crow, pigeon, parrot sparrow, eagle, etc. have eyes on either side of the head. The

size of their eyes is very small as compared to the size of their head.

Looking with One or Both Eyes

Question 23. Could you see your friend’s action, without moving your neck?

Answer:

No, I could not see it.

Question 24. Now try to look at your friend’s action with both your eyes open but without

moving your neck.

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Answer:

The viewing area increases when we see with both eyes.

Question 25. What was the difference on looking with one or both eyes?

Answer:

I can see things better with both my eyes.

Page number:7

Question 26. Now toss a small ball or a coin and try to catch it. Try this with both your eyes

open. Then close one eye and try to catch it. When was it easier to catch?

Answer:

When both eyes were open, it was easier to catch the coin.

Question 27. Imagine how it would be to have your eyes in place of your ears? What would

you be able to do then, which you cannot do now?

Answer:

If my ears were in place of my ears, I would have been able to see all the things to my right and

left clearly.

Question 28. Now can you guess from what distance can an eagle in the sky see a roti on the

ground?

Answer:

The vision of an eagle is much powerful than that of ours. An eagle can see a roti on the ground

from a distance of about one and a half of two kilometers.

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Page number: 8

Write

Question 29. The names of ten animals whose ears can be seen.

Answer:

Cow, buffalo, ox, horse, donkey, dog, deer, elephant, rabbit, monkey.

Question 30. The names of some animals whose ears are bigger than our ears.

Answer:

The ears of elephant, rabbit, cow, buffalo, ox, dog etc. are bigger than that of ours.

Think

Question 31. Is there some link between the size of animal’s ears and their hearing?

Answer:

I think there may be some link between the size of animal’s ears and their hearing. The animals

with larger ears can hear well because their ears can collect more sound waves.

Try This

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Question 32. For this activity find a quiet place in your school. Tell one of your friends to

stand at a small distance and ask him to say something softly. The rest of you should listen

carefully. Then all of you put your hands behind your ears, as shown in the picture. Let the

same child say something again as softly as before. In which case was the sound sharper?

Ask your friends too.

Answer:

When I put my hands behind my ears, the sound was sharper.

Question 33. Put your hands over your ears and say something. Can you hear your own

voice?]

Answer:

Yes, I can hear my own voice.

Page number: 9

Question 34. Sit near a desk. Tap the desk once with your hand. Listen carefully. Now put

your ear on the desk. Tap on the desk once again with your hand. Listen again. Was there

any difference in the sound of the tap?

Answer:

Yes, when I put my ear on the desk, the sound was sharper.

Page number: 10

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Write

Question 35. Can you understand the sounds of some animals? Which animals?

Answer:

Yes, I can recognize the sounds of few animals like dog, cow, cat, horse etc.

Question 36. Do some animals understand your language? Which animals?

Answer:

Yes. Some pet animals like dog, cow, ox, horse, parrot etc. can understand our language and

gestures.

Say It with Sounds

Question 37. Just like birds and dolphins you can also make your own language of sounds

for giving messages. Remember you have to talk to your friends with only sounds and no

words. How and when will you need to give an alarm call? For example, when the teacher

is coming to the classroom!

Answer:

You and your friends can produce some sounds like beep-beep or trin-trin for a specific purpose

like when the teacher is coming to the classroom. All the other will follow according to the

alarm.

Sleeping-waking

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Question 38. Have you noticed that during the cold season you cannot see any lizard in the

house? Where do you think they have gone?

Answer:

Yes, I have noticed it. I think to protect them from cold; they shift to some safe and conducive

place.

Page number: 11

Question 39. How will you show the clock for a house-lizard in winters?

Answer:

The gray color shows the sleeping time for the lizard in winters.

Question 40. Given here is the sleeping time of some animals. Below each picture write for

how many hours a day that animal sleeps.

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Answer:

Cow – 4 hours

Python – 18 hours

Giraffe – 2 hours

Cat – 12 hours

Question 41. When you see different animals, do you have any questions about them?

Make a list of ten such questions.

Answer:

Yes, when I see different animals, many questions arise in my mind like:

1. Can these animals talk with each other?

2. Can these animals understand our language?

3. Can these animals understand each-others language?

4. Can these animals understand one another’s feelings?

5. How can these animals guess the imminent natural calamity much before it happens?

6. How much useful are these animals?

7. If there were no animals on the earth, what would have happened?

8. What will happen if all animals are killed?

9. Why some animals are pet and some are wild?

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10. Why different animals have different food habits?

Page number: 12

Question 42. The tiger is one of the most alert animals. And yet, today Tigers are in danger.

What do you think are some of the dangers to tigers in the jungle?

Answer:

The biggest threat to tigers is from hunters and poachers who kill them for their skins. Besides,

they are threatened by other powerful animals like the lion. Dangers are also from the destruction

of forests, forest fibers and the growing imbalance in nature.

Question 43. Can human beings also be a threat to animals? How?

Answer:

Yes, human beings are also a threat to animals. Due to continuous poaching, many animals have

either go extinct or have come to the stage of extinction. Elephants are killed for their tusks;

rhinoceros for their hones, tigers; crocodiles, and snakes for their skins and so on. Musk deer are

killed to prepare scent from their musk. Further, growing human interference and destruction of

forests have only aggravated dangers to these animals.

Find Out

Question 44. Where are other such National Parks in India?

Answer:

There are many National Parks in India. Some of these are:

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1. Kanha National Park (Madhya Pradesh)

2. Kaziranga National Park (Assam)

3. Gir National Park (Gujarat)

4. Ranthambhore National Park (Rajasthan)

5. Nagarhole National Park (Mysore)

6. Palamau National Park (Jharkhand)

Question 45. Collect information on these and write a report.

Answer:

There are many species of birds and animals found in India. To protect them, our government

has made more than 75 National Park and more than 425 Sanctuaries. These cover about 4.5% of

the total land area of the country and are spread from Jammu & Kashmir to Tamil Nadu and

from Gujarat to Assam.

What We Have Learnt

Question 46. Have you noticed that sometimes singers put their hand on their ear when

they sing? Why do you think they may be doing this?

Answer:

Yes, I have noticed the same. I think they do so because after putting their hand on their ear, they

not only protect themselves from the noises but also hear their own voice more clearly. This

helps them to sing better.

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Question 47. Give examples of animals that may have very strong sense of sight, hearing or

smell.

Answer:

Some examples are given below.

(1) One dog can make out if another dog has come into its area by the smell of its urine or poo.

(2) A kite can see a piece of bread from a height of about two kilometers.

(3) Some animals begin to behave in a different manner guessing any natural calamity.

(4) Mosquitoes find a human being by the smell of its body or feet or by the heat of the body.

(5) A silkworm can find his female moth from many kilometers away by her smell.

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